Type-writing machine.



A. UTZ.

TYPE WRITING MACHINE.

APPLIGATIONAFILED MAR.Z4,1911.

WITNESSES INVENTOR ATTORNEY Patented June 4, 1912.

UNITED STATES PATENT OFFICE.

ANTHONY UTZ, OF HARTFORD, CONNECT ICUT, ASSIGNOR TO ROYAL TYIEEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Yatent.

' Patented June 4, 1912.

Application filed March 24, 1911. Serial No. 616,650.

To all whom it may concern: I

Be it known that- I, ANTHONY U'rz, a citizen of the United States of America, residing in Hartford, countyof Hartford, State of Connecticut, have invented a certain new and useful Improvement in TypelVriting Machines, of which the following is a specification. This invention relates to line space de vices of a rotatable cylinder typewriting machine. Its purpose is to simplify and cheapeinsuch devices and at the same time to afford a clearly observable definite indicator of the line space adjustment.

The invention is shown applied to line space devices of the general construction disclosed in the patent of Edward B. Hess, No. 856,869, granted June 11,1907.

In the accompanying drawing: Figure 1 is a detail section taken transversely to the platen axis adjacent the left hand end plate of the carriage: Fig. 2, a front elevation of what is shown in Fig. 1: Fig. 3, a sectional view, similar to Fig. 1, with the parts in a different position: and Fig. 4, a front ele vation of the devices shown in Fig. 3.

(1 indicates the left hand'side plate of the carriage.

0 is one member of a clutch joint'formedon the hub of the line space ratchet wheel (1, the other member of which clutch is carried at the end of the platen (not shown) and of which e is the shaft having applied to it the usual turningknob. The ratchet wheel and its hub are appropriately connected with the platen shaft by set screws or otherwise. On the outer side of v the ratchet wheel and rocking loosely upon the hub thereof is a radial arm f in the end of which is pivoted a ratchet wheel push pawl g, a spring h being applied around the pivot bolt of the pawl and tending constantly, by its reaction, to draw the end 9 of the pawl into engagement with the teeth of the ratchet wheel.

76 indicates a link pinned-to the radial an and operated in the manner disclosed in the aforesaid patent of Edward B. Hess, or otherwise, to swing the radial arm rearwardly and carry the pawl g in engagement with the ratchet wheel to turn the platen for line space purposes.

0 is the flanged guard or shield rocking on the hub of the ratchet wheel and;t he flange 0 of which overlies the periphery flange of the guard the ratchet wheel. This shield is adjustable, as is well understood, so that the rear edge of the upper part of the flange will control engagement of the end 9 of the actuating pawl with the teeth of the ratchet wheel.

The construction comprising the rocking arm f, link 71:, ratchet wheel shield -or guard 0 and the detent pawls for the ratchet wheel and its shield are all as disclosed in the aforesaid Letters Patent and behave in the same way and therefore more detailed description of them seems unnecessary. As in theI-less patent, the front faceof the flange overlying or embracing the periphery of the ratchet wheel is marked .with numbers to indicate the adjustment of the line space, these markings being 0, l, 2, 3 as seen in Fig. 2.

The present invention resides in the pe culiar construction and behavior of the pawl g. Its rear or ratchet wheel actuating end g engages the teeth of the ratchet wheel and the position of the shield determines at what point in its movement it may engage the wheel. The other end of the pawl,

,which is extended in front of its axis, serves as a marker or pointer that overlies the and so proportioned, arranged and adapted as to act an indicator or pointer in connection with the numerals or other markings that may be placed on the guard to indicate to the operator what is the line space adjustment. Thus, in Fig. 2, it will be seen that the pointer which is the end 9 of the ratchet wheel pawl lies immediately below or beyond the numeral 3, thus indicating that the adjustment of the shield is such that the engagement of the pawl with? the ratchet wheel will result in a movement of the platen 3 through the arc I of three ratchet wheel teeth.

In Fig. 4:, the adjustment is such that there will be a movement of the platen through the arc of but one ratchet wheel tooth, the pointer g being immediately above the numeral 1. This front end of the pawl is not shown as of the same width, or substantially the width, of the guar'd 0 but it obviously might be so. .ln the formin which it is illustrated, it substantially covers such numerals or markings on the guard 0 as lie above its lower edge. The indication of the adjustment is therefore very characteristic and readily observable without any possibility of confusion and this result is obtained without the addition of a special pointer. Such special pointers have hereto-' fore been provided and they have usually consisted of a separate piece attached to a proper part of the machine and arranged to extend toward or over the flange of .the guard from the side thereof. The indication that they give is not therefore so definite' and so readily read as that obtained by the present construction.

I claim:

1. A line space mechanism comprising the combination of the platen ratchet wheel, its adjust-ablefianged guard having upon the flange thereof characters indicating difi'erout line space adjustments, a swinging arm to be actuated by the operator, a pawl pivoted in said arm and one end of which is adapted to engage and drive the ratchet and the other end of which cooperates with the line space indications on the flange of the guard to indicate to the operator the ad justment of the devices.

52. Line spacing mechanism comprising the combination of the platen ratchet wheel, its adjustable flanged guard having line space indicators, a movable pawl support,

a pawl pivoted therein and adapted to actu ate the ratchet wheel and a line space indicator moving with said support and cotipcrating with the indications on the guard.

3. Line spacing mechanism comprising the combination of the platenratchet wheel, an adjustable guard having characters indicating the line spacing, aswinging pawl hereunto subscribed my name. i

ANTHONY UlZ.

Witnesses JAMES F. 'McBmNEr, LoulsA B. HENKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

